Cummins ISM 10.8 L Diesel Engine, 2004 US EPA Label, 23320 Engine hrs, Air Conditioner, Power Windows, Exhaust Brake, Eaton Fuller 10-Speed Manual Transmission, 12000 lb Front Axle, 20000 lb Rears, 32000 lb GVWR, 295/75R22.5 Front Tires, 275/80R22.5 Rear Tires, Air Ride Suspension, 146 in Wheelbase